<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8" />
		<title>9.关于控制台</title>
	</head>
	<body>
		<script type="text/javascript" >
			let obj = {
				arr:[1,3,5,7,9]
			}

			console.log(obj) 
			debugger;
			obj.arr[0] = 100
			console.log(obj) 

		</script>
	</body>
</html>